I run to the debuger i see that
(count(parent::Menu|$snode)=1) is allways true, even when $snode no
node, and even when there is no parent::Menu .
count(A|B)=1 will be true if A contains one node and B is empty, or if B
contains one node and A is empty, or if both A and B contain a single node
and this is the same node.
This is only a safe test for identity if you know that each of the node-sets
A and B is a single node. If you're not sure of that, a safer test is
count(A)=1 and count(B)=1 and count(A|B)=1
Michael Kay
http://www.saxonica.com/
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